From 52dcc4acf3c31883e4ca737c47fb3141e5a32a8c Mon Sep 17 00:00:00 2001
From: Val Packett <val@packett.cool>
Date: Tue, 24 Oct 2023 04:57:57 -0300
Subject: [PATCH] compiler: add munmap finalizer on cache hits to avoid memory
 leak

Signed-off-by: Val Packett <val@packett.cool>
---
 internal/engine/compiler/engine_cache.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/engine/compiler/engine_cache.go b/internal/engine/compiler/engine_cache.go
index 37e481bdb6..204eb1b8a5 100644
--- a/internal/engine/compiler/engine_cache.go
+++ b/internal/engine/compiler/engine_cache.go
@@ -46,6 +46,9 @@ func (e *engine) getCompiledModule(module *wasm.Module, listeners []experimental
 				cm.functions[i].listener = listeners[i]
 			}
 		}
+
+		// As this uses mmap, we need to munmap on the compiled machine code when it's GCed.
+		e.setFinalizer(cm, releaseCompiledModule)
 	}
 	return
 }